Selective extraction of light lanthanides(III) with 18-crown-6 and perfluorooctanoate

H. Imura; H. Mito

doi:10.1007/bf02042601

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 189: Issue 2

Selective extraction of light lanthanides(III) with 18-crown-6 and perfluorooctanoate

Authors:

H. Imura

H. Imura Ibaraki University Department of Chemistry, Faculty of Science 310 Mito Japan

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H. Mito

H. Mito Ibaraki University Department of Chemistry, Faculty of Science 310 Mito Japan

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Pages:: 229–235

Online Publication Date:: 14 Aug 2005

Publication Date:: 17 Jan 1995

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02042601

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Abstract

The extraction of La(III), Gd(III), and Lu(III) with 18-crown-6 (18C6) has been studied using pentadecafluorooctanoate (PDFO) as a counter anion. Very high extractability of La(III) was observed in various organic solvents such as benzene, chloroform, 1,2-dichloroethane, and nitrobenzene. The predominant species extracted into benzene was found to be Ln(PDFO)₃ (18C6), and the extraction constants (K_ex,s1=[Ln(PDFO)₃ (18C6)]_org/[Ln³⁺][PDFO]³[18C6]_org) were 10^13.12 for La(III), 10^9.74 for Gd(III), and 10^9.67 for Lu(III). These values are 10¹⁰ times higher than those in the trichloroacetate-18C6 system reported previously. The present PDFO-18C6 system was superior to the picrate- and hexafluoroacetylacetonate-18C6 system for the separation efficiency of light lanthanides(III).

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)